@article{VSPUI_2013_1_a4,
     author = {I. M. Proudnikov},
     title = {A method of construction of exhaustive family of upper convex approximations},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {37--51},
     publisher = {mathdoc},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2013_1_a4/}
}